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Finding the Fourth Proportional to 121,881.99, 182,790.17 and 42,985.96

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Solution

The fourth proportional to 121,881.99, 182,790.17 and 42,985.96 is: 64,467.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,881.99 : 182,790.17 = 42,985.96 : x
  2. Step 2: Convert to fraction form
    121,881.99/182,790.17 = 42,985.96/x
  3. Step 3: Cross multiply
    121,881.99x = 182,790.17 × 42,985.96
  4. Step 4: Simplify right side
    121,881.99x = 7,857,410,936.01
  5. Step 5: Solve for x
    x = 7,857,410,936.01/121,881.99
  6. Step 6: Final answer
    x = 64,467.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.